Abrading machine



Feb. 9, 1932. F. KABELAC ABRADING MACHINE 2 Sheeiis-Sheet Filed June '7,1929 INVENTOR v2? 607% fizfi 766;) ATTGRNEY Feb. 9, 1932. vr--. KABELACABRADING MACHINE Filed June 7, 1929 z'sheets-sheet 2 INVENTOR 23 MfioeZcac BY w ATTORNEY Patented Feb. 9, 1932 PATENT OFFICE FRANKKAIBELAG, OF ROCHESTER, NEW YORK .ABRADING MACHINE Application filedJune 7, 1929. Serial No. 369,089.

The present invention relates to abrading machines, and moreparticularly to the type employing an endless abrading belt. An objectof this invention is to provide a novel means of changing the contour ofthe belt at the working point so that a single belt may be employed forwork of difi'erent contours. Another object of the invention is toprovide an abrading belt which employs Fig. 3 is a transverse sectionthrough the abrading belt;

Fig. 4 is a section on the line 4--4;, Fig. 1; and

Figs. 5, 6, and 7 are face views of three different belt shaping rollerswhich may be employed.

In the illustrated embodiment of the invention 1 indicates the frame ofthe machine on which is journalled a drive shaft 2 which may carry adrive pulley 3 and a pulley 4c about which passes the abrading belt, thepreferred form of which will be hereinafter more particularly described.Also arranged on the frame 1 is a pulley 5 about which the abrading beltalso travels.

With the end in view of providing a working area on the belt changeablein transverse contour to correspond to the contour of different workpieces, there maybe provided a carrier or turret 6 in the form of arotary disk turning on a shaft 7 which is mounted on the frame 1. Thiscarrier is also provided with a plurality of shafts 8 arranged inequidistant relation about the axis of. turning of the carrier and onone side of the latter. On

the shafts 8 are arranged belt shaping pulleys 9'having theirperipheries of difierent con tours. Three of such pulleys are shown butit will be understood thatany number may. be employed and that thecontours will vary with the workope'rated upon;

For holding the rotary carrier against turning with one of the pulleys 9engaged-by the abrading belt, a holding means of any suitableconstruction may be employed. In this instance, the carrier has on itsinner face a plurality of pockets 10 one wall 11 of each of said pocketsprojecting beyond the face of the carrier and forms an abutment.

'Detainingmeans is provided on the frame 1 preferably in the form of asliding detent 12. This detent has a normal tendency to move todetaining position but is moved from detaining position manually. Tothis end, a hand lever 13 is pivoted at 14 to the frame 1 and at 15 tothe detent, While a spring 16 acts on the lever to hold the detent indetaining position.

In order to insure the detent 12 being in position to engage with anabutment 11 and enter a pocket 10, a shifter is provided which willshift the detent to detaining position in the event that the user of themachine has not released the hand lever 13". This shifter, in thisinstance, isin the form of a slide 17 pivoted at 18 to the lever 13 andhaving a bevelled end 19 to cooperate with the projecting abutments 11.

WVith' the end inview of imparting movement to the carrier 6 from theabrading belt, the carrier has portions 20 in'the "form of curvedflanges extending between the shaping or contour forming pulleys 9.flanges are so formed and arranged that when the abrading belt engagesany one of the pulleys 9-the flanges are not engaged. As, when pulley 9is engaged by the abrading belt its turning axis 8 is below the turningaxis 7 of These 8 BIJ the carrier, there is a tendency for the abradingbelt which turns in the direction of the arrows Fig. 1, to shift theengaged pulley, but this shifting is prevented by the detent 12. lViththe release of the carrier 6 by the detent 12', the shifting takes placeand the belt then engages the next flange 20 so that the carrier isthrough said flange rotated until the next stop or abutment 11 isengaged by the detent 12 when the belt will lie in engagement with thenext shaping pulley 9.

The brading belt comprises, in this instance, a strip of sand paper 21which is adhesively secured to a strip 22 of textile material, such ascotton sheeting. The edges of this textile strip are reinforced by twoend less wire strands 28. The strip of sand paper is manufactured sothat it has a concave-convex cross section, and this too maintains it onthe pulleys 4 and 5, thus being assisted by the strands 23. The textilematerial prevents the Wearing of the sand paper and adds considerably tothelength of life of the abrading belt and the marginalwires'stren'gthen the edges of the textile material. The pulleys 9 maybe felt faced as is the custom in abrading machines.

In this invention, the shaping or contour forming rollers are shiftedautomatically to theirposition of use through means of the abradingbelt. The abrading belt is of novel construction and has longer lifethan abrading belts now in use.

What I claim as my invention and desire to secure by Letters Patent is:

1. An 'abrading machine comprising an abrading belt, means for drivingthe same, a movable carrier, a plurality of contour forming pulleysonthe carrier movable successively by the carrier to a position to shapethe belt, detaining means for holding the carrier in position to causeany oneof the pulleys to act on the belt, and means on the carrierengaged by the belt to shift the carrier to present another pulley to ashaping position on the release of the carrier by the detaining means.

2. An abra'ding machine comprising an endless abrading belt, means fordriving the same, a rotary carrier, a plurality of belt shaping pulleyson the carrier, detaining means for holding any one of the shapingrollers in shaping relation to the carrier, and means on the carrierengaged by the abrading belt when the carrier is-released to cause thecarrier to shift on its axis to present another shaping pulley to beshifted to shaping position. 7 V

. 3. An abrading machine comprising an endless abrading belt, means fordriving the rier into and out of shaping relation with the belt, andflanges arranged between the pulleys on the disk and engaged by the beltto shift the carrier.

FRANK KABELAO.

same, a carrier, belt shaping pulleys on the to shift one'pulley out ofshaping relation

